How to restrict user operations on tables to read-only in Oracle database?

In the Oracle database, you can limit the user's operations on the table to read-only by granting read-only permissions. The following will introduce in detail how to implement this function in Oracle database and provide specific code examples.

1. Create a new read-only role:

   CREATE ROLE readonly_role;

2. Set the role to read-only permissions:

   GRANT SELECT ON <表名> TO readonly_role;

   here The <Table name> is the name of the table to be set with read-only permissions. It can be replaced with a specific table name according to the actual situation.

3. Create a new user and assign a read-only role:

   CREATE USER readonly_user IDENTIFIED BY password;
   GRANT readonly_role TO readonly_user;

   readonly_user here is the newly created read-only user, password is the user password.

4. Test the table operation permissions of read-only users:

   -- 以只读用户登录
   CONNECT readonly_user/password;
   
   -- 尝试插入数据
   INSERT INTO <表名> (column1, column2) VALUES ('value1', 'value2');
   --将返回ORA-01031: insufficient privileges错误，表示插入操作被拒绝
   
   -- 查询数据
   SELECT * FROM <表名>;
   --将成功查询到表中的数据

Through the above steps, we successfully restricted the user to specific operations in the Oracle database Table operations are read-only. Read-only users can only query the data in the table, but cannot perform operations such as insert, update, or delete, thus effectively protecting the integrity and security of the data.

Hope the above code example can help you implement read-only operation restrictions on tables in Oracle database.

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